I bought another Betta and made a lovely new home for him out of this huge decorative glass jar I bought at micheals. It came with a lid but of course I don't to seal out the air. So for now I took some screen and an elastic band to go around the top to keep the cat out of the bowl. Any ideas out there for something more eye pleasing. The opening is round.

I had to keep Lunch in a 1 gallon bowl for about a week, and the cats really wanted in! My daughter got a new tent for Christmas, and the old one was trashed, so I cut the black netting off the side of my daughter's old tent, stretched it over the top and put electrical tight strips (you know, for keeping cords in a bundle) around the top nice and snug.. then to make it look nice, I wrapped black lace around the tight strips and tied it in a bow. Lunch was Gothic Lolita for about a week.. hubby kept making fun of him for his frilly dress. But it kept the cats out and let air in, worked perfect. Was kind of a pain to cut the strips every time I had to change the water, though.